chore: create trigger for workspace delete action

migrations/20250305082545_workspace_delete_trigger.sql

@@ -1,4 +1,10 @@
--- Create the trigger function
+CREATE TABLE IF NOT EXISTS af_workspace_deleted (
+    id serial PRIMARY KEY,
+    workspace_id uuid NOT NULL,
+    owner_id BIGINT NOT NULL,
+    deleted_at timestamp with time zone DEFAULT now()
+);
+
 CREATE OR REPLACE FUNCTION workspace_deleted_trigger_function()
 RETURNS trigger AS
 $$
@@ -9,13 +15,13 @@ BEGIN
         'workspace_id', OLD.workspace_id,
         'owner_id', OLD.owner_uid
     );
-
+    INSERT INTO af_workspace_deleted (workspace_id, owner_id, deleted_at)
+    VALUES (OLD.workspace_id, OLD.owner_uid, now());
     PERFORM pg_notify('af_workspace_deleted', payload::text);
     RETURN OLD;
 END;
 $$ LANGUAGE plpgsql;
 
--- Create the trigger that calls the function after deleting a workspace
 CREATE TRIGGER on_workspace_delete
 AFTER DELETE ON public.af_workspace
 FOR EACH ROW